| 摘要 |
PURPOSE: A glass antenna apparatus is provided to improve a receive sensitivity by installing an impedance matching circuit and a high-frequency pass circuit between a glass antenna and a receiver. CONSTITUTION: An impedance matching circuit(18a) is connected from a feeder(15) to connect a receiver(20). The impedance matching circuit(18a) compensates an impedance mismatching of a glass antenna(11) and a heat wire(12) and matches an impedance of a feeder(15). A high-frequency pass filter(18b) is connected from the feeder(15) to the receiver(20). The impedance matching circuit(18a) passes a received AM(Amplitude Modulation) signal and matches the impedance of the AM signal through the feeder(15). The high-frequency pass filter(18b) passes a received FM signal and reinforces the receive sensibility of the FM(Frequency Modulation) signal through the feeder(15).
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